Effects of vertical vibration on hopper flows of granular material
Abstract
The discharge of granular material from a hopper subject to vertical sinusoidal oscillations was investigated using experiments and discrete element computer simulations. With the hopper exit closed, side-wall convection cells are observed, oriented such that particles move up along the inclined walls of the hopper and down at the center line. The convection cells are a result of the granular bed dilation during free fall and the subsequent interaction with the hopper walls. The mass discharge rate for a vibrating hopper scaled by the discharge rate without vibration reaches a maximum value at a dimensionless velocity amplitude just greater than 1. Further increases in the velocity decrease the discharge rate. The decrease occurs due to a decrease in the bulk density of the discharging material when vibration is applied.
Additional Information
Received 30 August 2001; accepted 9 July 2002; published 3 September 2002.Files
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Additional details
- Eprint ID
- 168
- Resolver ID
- CaltechAUTHORS:WASpf02
- Created
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2004-11-09Created from EPrint's datestamp field
- Updated
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2021-11-08Created from EPrint's last_modified field